问C++中的“声明没有存储类或类型说明符”

EN

#include<iostream>
#include<vector>
#include<new>

using namespace std;

vector<int>* func(){
    return new vector<int>();
}

void read_vec(istream &in, vector<int>* vp){
    int i;
    while(in>>i)
        vp->push_back(i);
}

void print_vec(vector<int>* vp){
    for(int i:*vp)
        cout<<i<<" ";
    cout<<endl;
}

int main(){
    auto vec = func();
    cout<<"Enter a sequence of integers"<<endl;
    read_vec(cin,vec);
    print_vec(vec);
    delete vec;
    vec = nullptr;

    system("pause");
}